Question

A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car’s acceleration?

A )2 m/s2
B )15 m/s2
C )30 m/s2
D )50 m/s2

Answer 1

it should be A. 2 m/s² because the equation for acceleration is ( final− initial) / Time so you must subtract 10 from 40 and you'll get 30 then you divide by 15 to get your answer 2.

Answer 2

The acceleration of the car is 2 m/s².

A is correct.

Step-by-step explanation:

Given that,

Initial velocity =10 m/s

Final velocity =40 m/s

Time = 15 sec

The acceleration is the rate of change of velocity.

The acceleration of the car is

Using equation of motion

`v = u+at`

Here, v = final velocity

u = initial velocity

t = time

`40=10+a*15`

`a = (30)/(15)`

`a = 2\ m/s^2`

Hence, The acceleration of the car is 2 m/s².